What safety problems are there in the Self Check image?
Answer
First, the doll is not wearing safety glasses. Second, the open end of the test tube is directed toward the doll's face.
Is the mixing procedure used in the video sufficient?
Answer
No, there is too much solution in the test tube to sufficiently mix the two components by tapping the test tube. You should use a glass rod if the test tube is filled to near-capacity.